Boat Forum / Electronics / November 2006

I was given a Heart EMS-1800 Inverter that had had the 12v polarity
reversed. It does not work now of course, but is it repairable?

Any suggestions on adding AIS and Bluetooth to a Raymaine seatalk
suite?  Is there a lower cost NEMA multiplexer with Bluetooth one could
consider?
Bob

Known:
50 amp shore power receptacle. 30 amp boat connection. 30 amp isolation
transformer. 4kw generator connected to boatside 110v system. Battery
chargers and 110v receptacles and 13v ac lighting fed from shore

I got a Yanmar engine (3YM30).  I only have  an "overheating" signal
but would like to get a temperature gauge installed. I have a C-80
Raymarine on my boat with supposedly can display temperature data when
transmitted in NMEA-2000 format. So it should theoretically be possible

I am looking to make a 24v/48v Series/Parallel Switch so that I can
charge 4 12v batteries at 24v 65A and use them at 48v 200A and wondered
if there was any pointers out there on how to do it - probably with a
few DC contactors.

I read in Practical Sailor about radar, and their reccomendations were
the Furuno 1715 (? I think), and not rated as good was the 1623.  I
have a race boat, and want a radar, but as small and light as possible.
While sailing aboard Derek Baylis, a Wylie Cat 65 this past weekend, I

I found an online cruising guide site the other night that is free and
has an interesting approach to boating.  The site is at
http://www.myboatersguide.com. It looks like the site is just getting
started, but the site has a lot of good anchorages and stuff, I liked

"RayTech RNS 6.0 Navigation Software has been honored with the Best in
Show Award 2006 from the National Marine Electronics Association
(NMEA)." - Raymarine Web Site.
"Raymarine's RayTech RNS 6.0 Navigation Software offers boaters the

I have been seeing the following AIS message (my location is a bit north of
San Francisco), and I can't identify it in the specs I have access to:
!AIVDM,1,1,,A,?03Ovk1GP0?`000,2*33
!AIVDM,1,1,,A,?03Ovk1GP`FP000,2*2A

Is something wrong with my reader or has posting to this group gone from a
few to almost none?  Is it the time of year, or what?
Butch

I'm interested in developing marine electronics for educational
research purposes.
The NMEA 2000 standard looks interesting.  But $3999.00 for just the
main document? (actually, from what I glean from the order page the

Putting together a recommendation for an electronics package for a new 35
Express fisherman to be used for occasional cruising and salmon fishing on
the great Lakes.  Owner wants the best that money can buy that doesn't  give
him functions  he doesn't needs.